Table 2.
Summary of stabilizing effect of excipients on the three peptides
| Formulation# | Peptide | CMCS added | Salt added | % native peptide | ||||
|---|---|---|---|---|---|---|---|---|
| 3 day | 7 day | 14 day | 21 day | 28 day | ||||
| 1 | Oct | − | − | − | 92.7± 0.5 | 88.1 ± 0.3 | 80.8 ± 0.4 | 76.3 ± 0.4 |
| 2 | Oct | + | − | − | 94.0 ± 0.6 | 90.2 ± 0.4 | 86 ± 2 | 77 ± 2 |
| 3 | Oct | − | CaCl2 | − | 97.7 ± 0.2 | 94.5 ± 0.2 | 91.0 ± 0.7 | 85.2 ± 0.9 |
| 4 | Oct | − | MnCl2 | − | 97.7 ± 0.1 | 95.4 ± 0.5 | 91.1 ± 0.6 | 85.9 ± 0.5 |
| 5 | Oct | + | CaCl2 | − | 97.4 ± 0.4 | 95.9 ± 0.4 | 92.8 ± 0.1 | 89.2 ± 0.4 |
| 6 | Oct | + | MnCl2 | − | 98.1 ± 0.2 | 96.7 ± 0.6 | 94.0 ± 0.7 | 90.1 ± 0.4 |
| 7 | sCT | − | − | 93.5 ± 0.9 | 91 ± 3 | 84 ± 3 | 83 ± 7 | − |
| 8 | sCT | + | − | 100.0 ± 0.1 | 92 ± 3 | 88 ± 6 | 83.8 ± 0.8 | − |
| 9 | sCT | − | CaCl2 | 99.9 ± 0.2 | 94.3 ± 0.3 | 85 ± 2 | 87 ± 6 | − |
| 10 | sCT | − | MnCl2 | 97 ± 1 | 94 ± 3 | 86 ± 2 | 88 ± 4 | − |
| 11 | sCT | + | CaCl2 | 100.0 ± 0.1 | 100.0 ± 0.1 | 99.7 ± 0.5 | 98 ± 2 | − |
| 12 | sCT | + | MnCl2 | 99.3 ± 0.9 | 99 ± 2 | 99 ± 2 | 98.3 ± 0.3 | − |
| 13 | hPTH | − | − | 77 ± 2 | 68 ± 2 | 56 ± 3 | 46.1 ± 0.8 | − |
| 14 | hPTH | + | − | 83 ± 2 | 71.7 ± 0.5 | 58.2 ± 0.7 | 50 ± 3 | − |
| 15 | hPTH | − | CaCl2 | 90 ± 3 | 88 ± 3 | 76 ± 2 | 62 ± 4 | − |
| 16 | hPTH | − | MnCl2 | 95.2 ± 0.6 | 92 ± 2 | 89 ± 3 | 84 ± 2 | − |
| 17 | hPTH | + | CaCl2 | 93.7 ± 0.8 | 88.3 ± 0.8 | 73 ± 2 | 69 ± 3 | − |
| 18 | hPTH | + | MnCl2 | 94.9±0.7 | 90.5 ± 0.5 | 72 ± 2 | 61 ± 4 | − |